The availability of low cost but relatively high power laser pointers (hundreds of mW) has led to misuse with potentially dangerous consequences, such as dazzling aircraft which has raised concerns about aircraft safety. A low cost laser detection system based on coherence detection has been developed and is able to detect weak, continuous laser sources even against bright background light. In this paper, we introduce the use of a cone mirror to extend the horizontal field of view of the detector (originally at 3°) to 360° to detect incoming beams from different directions. With the additional use of a camera in the system, we also determine the direction of the incoming laser beam. Finally, the sensitivity between the original system and the cone mirror system are compared: the new system showed promising results with a sensitivity below 100nW.
|Proceedings of SPIE - International Society for Optical Engineering
|Published - 7 Oct 2019
|Technologies for Optical Countermeasures XVI - Strasbourg, France
Duration: 9 Sept 2019 → 12 Sept 2019
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- Coherence discrimination
- Cone mirror
- Field of view
- Laser direction
- Laser warning systems